package com.funny.springcloud.controller;

import com.funny.springcloud.entities.Payment;
import com.funny.springcloud.lb.LoadBalancer;
import com.funny.springcloud.utils.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {

    // private static final String PAYMENT_URL = "http://localhost:8001";
    private static final String PAYMENT_URL = "http://CLOUD-PROVIDER-PAYMENT";

    @Resource
    private RestTemplate restTemplate;

    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private DiscoveryClient discoveryClient;

    @PostMapping("/consumer/payment/add")
    public R<Payment> add(Payment payment) {
        return restTemplate.postForObject(PAYMENT_URL + "/payment/add", payment, R.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public R<Integer> getPayment(@PathVariable("id") Long id) {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/get/" + id, R.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public R<Integer> getForEntityPayment(@PathVariable("id") Long id) {
        ResponseEntity<R> result =  restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, R.class);
        if (result.getStatusCode().is2xxSuccessful()) {
            return result.getBody();
        }
        return new R<>(404, "操作失败");
    }

    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB() {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PROVIDER-PAYMENT");
        if (instances == null || instances.size() <= 0) {
            return null;
        }

        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();
        return restTemplate.getForObject(uri + "/payment/lb", String.class);
    }

    @GetMapping(value="/consumer/payment/zipkin")
    public String paymentZipkin() {
        return restTemplate.getForObject(PAYMENT_URL + "/payment/zipkin", String.class);
    }

}
